I was typing in this exact moment,
Scura is coming home with me this week (hopefully on friday), so deal was made.
It's the N. 595 and comes with some "adjustments",
as said before it mounts the 1151 (?) cc kit (two valves),new cams/double plate clutch etc..
(original engine had oil spilling problems)
Quat D exhaust is street legal (didn't know about that)
Tail/rear fender was handmade by the actual owner. He did severals in 2002-2005 and are still mounted on some bikes in italy.
I hope to post more details before the weekend, now I'll prepare a tool kit to be mounted somewhere (It's a guzzi, you know)